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My puppy is vomiting, lethargic, and has diarrhea. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Miniature Pinscher | Male | unneutered | 3 lbs

My puppy Jack seemed to get really upset the other day when I left for a couple days, he stopped eating and wouldn't play like normal, he was just sleeping and vomiting. When I got home, he was happy and playful at first then he got real sick. He can only keep small amounts of diluted pedialyte down, he is vomiting, distant, lethargic, uncomfortable, has diarrhea, and keeps trying to hide. He's like my baby, please help!

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1 Answer

Most Helpful Answer

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Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on October 14th, 2017

I would recommend that Jack get checked out by a vet as soon as possible. If he can't keep down fluids he will become dehydrated very quickly. He may have stopped eating while you are gone because he missed you, but it might have also been a coincidence in timing and that is just when he started showing signs of illness. Vomiting and lethargy in a puppy can be caused by dietary indiscretion, intestinal parasites, GI blockage, gastroenteritis, bacterial or viral infection (such as parvo virus), among others. After a thorough medical exam and questions on his vaccination history, the vet may recommend diagnostics such as bloodwork, parvo testing, or x-rays to see what could be causing his illness.

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